TLDers Domain Prices — MCP server

Live domain prices from 145+ registrars and 1,100+ TLDs, as a remote Model Context Protocol server. Ask your AI assistant where a domain is cheapest to register, renew or transfer, compare extensions, find promo codes and check availability — with real, daily-updated prices from TLDers.

Use it two ways: connect to the hosted server at https://www.tlders.com/api/mcp, or run this repository's small local (stdio) server, which forwards each tool call to the hosted one with your key.

Connect

Get a free API key at https://www.tlders.com/developers (no card needed).
Add a remote MCP server (Streamable HTTP):

Client	Setting
Clients that support headers (Claude Code, Cursor, VS Code, MCP Inspector)	URL `https://www.tlders.com/api/mcp`, header `Authorization: Bearer tld_live_...`
claude.ai custom connectors and other clients without header support	URL `https://www.tlders.com/api/mcp?key=tld_live_...`

Claude Code:

claude mcp add --transport http tlders https://www.tlders.com/api/mcp \
  --header "Authorization: Bearer tld_live_..."

Treat a URL with ?key= like a password. If it leaks, revoke the key from your TLDers account and create a new one.

Local (stdio) server

For Claude Desktop's config file and other clients that run local servers. Needs Node.js 18+.

{
  "mcpServers": {
    "tlders": {
      "command": "npx",
      "args": ["-y", "@tlders/mcp"],
      "env": { "TLDERS_API_KEY": "tld_live_..." }
    }
  }
}

Until the npm package is published, run it from a clone instead: npm install, then use "command": "node", "args": ["/path/to/tlders-mcp/index.js"].

Tools

Tool	What it does
`find_cheapest_tlds`	Cheapest registrar per extension for first-year registration, renewal, transfer and 3-year total
`get_tld_prices`	Every registrar's register / renew / transfer price for one extension, cheapest first
`compare_tlds`	Compare registrar prices across up to 20 extensions
`get_tld_price_history`	Per-registrar registration and renewal price history
`list_promo_codes`	Active registrar promo codes, biggest discount first
`check_domain_availability`	Live availability for a full domain name (RDAP, WHOIS fallback)
`list_registrars`	Every tracked registrar with WHOIS-privacy info

Prices are USD per year. First-year prices are often promotions, so the renewal price is always included.

Example prompts

"Where is a .com cheapest to register and to renew?"
"Compare .io, .ai and .dev prices over three years."
"Is my-startup.dev available, and which registrar should I buy it from?"
"Are there any promo codes for .xyz right now?"

Plans

Plan	Limit
Free	100 requests a month, one key
Monthly ($5) / Yearly	1,000 requests a day per key, up to 5 keys, plus bulk prices

Full API docs and the OpenAPI spec: https://www.tlders.com/developers

Support

[email protected]

TLDers Domain Prices — MCP server